Stadium: TSITSIPAS COURT Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Heraklion | 2021/11/03 07:00 | Gorazd Srbljak v Zsombor Velcz | 6-4,6-4 |
| ITF - M15 Doha | 2021/10/13 12:30 | Zsombor Velcz v Tom Kocevar-Desman | 2-6,1-6 |
| ITF - M25 Budapešť | 2021/09/28 07:30 | Zsombor Velcz v Attila Boros | 7-5,6-7,4-6 |
| ITF - M15 Zlatibor | 2021/09/17 10:55 | Yan Bondarevskiy v Zsombor Velcz | 6-4,6-1 |
| ITF - M15 Zlatibor | 2021/09/16 11:30 | Zsombor Velcz v Sebastian Gima | 6-3,6-4 |
| ITF - M15 Zlatibor | 2021/09/15 09:30 | Zsombor Velcz v Savva Polukhin | 6-4,6-4 |
| ITF - M15 Žilina | 2021/09/03 09:45 | Zsombor Velcz v Adria Soriano Barrera | 3-6,4-6 |
| ITF - M15 Žilina | 2021/09/02 07:55 | Zsombor Velcz v Peter Nad | 7-6,6-2 |
| ITF - M15 Heraklion | 2021/11/03 12:40 | Ioannis Kountourakis v Mark Lajal | 6-4,1-6,2-6 |
| ITF - M15 Heraklion | 2021/11/02 07:00 | Jonathan Backman v Ioannis Kountourakis | 6-1,6-7,7-10 |
| ITF - M15 Heraklion | 2021/11/01 11:00 | Ioannis Kountourakis v Nikolas Moceanu | 6-1,6-2 |
| ITF - M15 Káhira | 2021/09/13 08:00 | Ioannis Kountourakis v Maikel De Boes | 4-6,4-6 |
| ITF - M15 Káhira | 2021/09/07 07:30 | Tobias Franco v Ioannis Kountourakis | 6-4,6-2 |
| ITF - M15 Káhira | 2021/09/06 08:30 | Antonio Mazzeo v Ioannis Kountourakis | 2-6,4-6 |
| ITF - M15 Káhira | 2021/09/05 07:30 | Ioannis Kountourakis v Atharva Sharma | 6-4,6-3 |
| ITF - M15 Káhira | 2021/08/30 09:00 | Louis Allen v Ioannis Kountourakis | 6-7,6-4,10-6 |